Chinese philosophy originates in the Spring and Autumn and Warring States eras, during a period known as the "Hundred Schools of Thought", which was characterized by significant intellectual and cultural developments. Although much of Chinese philosophy begins in the Warring States period, elements of Chinese philosophy have existed for several thousand years; some can be found in the Yi Jing (the Book of Changes), an ancient compendium of divination, which dates back to at least 672 BCE. It was during the Warring States era that what Sima Tan termed the major philosophical schools of China, Confucianism, Legalism, and Daoism, arose, along with philosophies that later fell into obscurity, like Agriculturalism, Mohism, Chinese Naturalism, and the Logicians.